Ion exchange resin beads having aminoalkylphosphonic groups and processes for preparing them

The ion exchange resin beads have functional groups of formula I wherein R1, R2, R3, R4, m, r and q have the meanings stated in claim 1 and which have a matrix of a cross-linked polymer wherein the level of cross-linkages is decreased in the shell area is compared to the core area. These ion exchang...

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Bibliographic Details
Main Authors MOON; NICHOLAS, EIFFLER; JURGEN
Format Patent
LanguageEnglish
Published 11.01.1994
Edition5
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR PREPARATION OR CHEMICAL WORKING-UP
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:The ion exchange resin beads have functional groups of formula I wherein R1, R2, R3, R4, m, r and q have the meanings stated in claim 1 and which have a matrix of a cross-linked polymer wherein the level of cross-linkages is decreased in the shell area is compared to the core area. These ion exchange resin beads are prepared by reacting resin beads which have primary or secondary amino groups and the mentioned matrix of a cross-linked polymer with a1) a hypophosphite salt in the presence of an acid, or a2) a hypophosphorous acid and b) formaldehyde or a formaldehyde releasing compound.
Bibliography:Application Number: US19890380568